**Explanation:**

The correct answer is option 'A', yellow elastic connective tissue fibers.

**Preservation of arteries in mummies**

The preservation of arteries in mummies is due to the presence of yellow elastic connective tissue fibers. These fibers are a type of connective tissue that provide strength and elasticity to the arterial walls. They are composed of the protein elastin, which allows the arteries to stretch and recoil during the pumping of blood.

**Function of yellow elastic connective tissue fibers**

Yellow elastic connective tissue fibers are found in various parts of the body, including the walls of arteries. They have several important functions, including:

1. Elasticity: The elastic fibers allow the arteries to stretch and recoil as blood is pumped through them. This elasticity helps maintain blood pressure and ensures efficient blood flow.

2. Strength: The elastic fibers provide strength and support to the arterial walls, preventing them from collapsing or rupturing under pressure.

3. Flexibility: The elastic fibers allow the arteries to bend and flex as the body moves, ensuring proper blood flow to all parts of the body.

4. Durability: The elastic fibers are highly durable and resistant to degradation, allowing them to maintain their structural integrity over time.

**Preservation of arterial tissues in mummies**

When a body is mummified, the preservation process involves removing moisture and preventing the growth of bacteria and fungi. This helps to slow down the decomposition of tissues, including the arteries.

The presence of yellow elastic connective tissue fibers in the arterial walls contributes to their preservation. These fibers are highly resistant to degradation and can withstand the test of time. They help to maintain the structural integrity of the arterial walls, preventing them from collapsing or breaking down even after thousands of years.

In contrast, white fibrous connective tissue fibers, cartilage, and valves do not contribute to the preservation of arterial tissues in mummies. White fibrous connective tissue fibers are mainly found in tendons and ligaments, while cartilage is a type of connective tissue found in joints and other body parts. Valves are structures within the veins that help prevent the backflow of blood.

In conclusion, the preservation of arteries in mummies is primarily due to the presence of yellow elastic connective tissue fibers. These fibers provide strength, elasticity, and durability to the arterial walls, allowing them to withstand the test of time.