Viruses can “reproduce..."

A) independently of host cells

B) independently of host cells given they take up the organelles first

C) only within host cells

D) only with the assistance of
other viruses

B.

Explanation:

They take up the host organelles to reproduce more viruses inside.

not necessarily. higher fitness requires the organism to be reproductive successful. for example, an organism at age 10 with 15 offspring is much more fit than an organism at age 15 with only 5 offspring.