The correct answer is option 'B' - Copeland.

Explanation:
The four kingdom system of classification was proposed by Herbert F. Copeland in 1956. This system expands upon the previous three kingdom system proposed by Carl Linnaeus in the 18th century. Let us understand the four kingdom system of classification in detail.

1. Monera:
The first kingdom in the four kingdom system is Monera. It includes all the prokaryotic organisms, which are characterized by the absence of a true nucleus and membrane-bound organelles. Monera includes bacteria and cyanobacteria (blue-green algae). These organisms are unicellular and can be found in various habitats.

2. Protista:
The second kingdom is Protista, which includes all the eukaryotic organisms that are not classified as plants, animals, or fungi. Protists are mostly unicellular, although some may be multi-cellular. They exhibit a wide range of characteristics and can be found in aquatic environments. Examples of protists include amoeba, paramecium, and algae.

3. Fungi:
The third kingdom is Fungi, which includes organisms that are eukaryotic and heterotrophic. Fungi obtain their nutrients by absorbing them from the environment. They reproduce through spores and have a cell wall made of chitin. Fungi include mushrooms, molds, and yeasts.

4. Plantae:
The fourth and final kingdom in the four kingdom system is Plantae, which includes multicellular, eukaryotic organisms that carry out photosynthesis. Plants have a cell wall made of cellulose and are autotrophic in nature. They play a vital role in the ecosystem by producing oxygen and providing food for other organisms. Examples of plants include trees, grasses, and flowering plants.

In summary, the four kingdom system of classification proposed by Copeland includes Monera, Protista, Fungi, and Plantae. This system provides a broader classification of organisms, encompassing prokaryotic and eukaryotic organisms from various habitats.