The correct answer is option 'C', which is "Gusset plate".

A gusset plate is a plate used for connecting two or more structural members that intersect each other. It is often used in steel structures to provide additional strength and stability at the joints where the members meet. The gusset plate is typically made of steel and is bolted or welded to the intersecting members.

Here is a detailed explanation of each option provided:

a) Template: A template is a pattern or guide used to shape or cut materials into a desired form. It is not directly related to connecting structural members, so it is not the correct answer for this question.

b) Baseplate: A baseplate is a plate that is used as a foundation or support for a column or other structural element. It is typically anchored to the ground or a concrete footing to provide stability. While a baseplate may be used in conjunction with a gusset plate to connect structural members, it is not specifically used for connecting intersecting members, so it is not the correct answer.

c) Gusset plate: A gusset plate is a plate used for connecting two or more structural members that intersect each other. It is typically used at joints to provide additional strength and stability. The gusset plate is typically made of steel and is bolted or welded to the intersecting members. This option is the correct answer for the question.

d) Shoe plate: The term "shoe plate" is not commonly used in the context of connecting structural members. It may refer to a plate used in machinery or equipment to support or guide parts, but it is not directly related to connecting intersecting structural members. Therefore, it is not the correct answer for this question.

In summary, a gusset plate is a plate used for connecting two or more structural members that intersect each other. It provides additional strength and stability at the joints.