Question

which statement best describes how cancers are classified?
a. cancers are classified according to the type of tissue they affect.
b. cancers are classified according to the rate at which they grow.
c. cancers are classified by how many organs they affect.
d. cancers are classified by the size of the cells that are involved.

Explanation:

Cancers are typically classified based on the type of tissue they originate from. For example, carcinomas (from epithelial tissue), sarcomas (from connective tissue), etc. The growth rate (Option B) can be a characteristic but not the primary classification basis. The number of organs affected (Option C) relates more to the stage of cancer (e.g., metastatic stage) rather than classification. Cell size (Option D) is not the main factor for cancer classification.

Answer:

A. Cancers are classified according to the type of tissue they affect.