Answer:
C. sporophyte
Step-by-step explanation:
The sporophyte represents the life cycle that becomes more dominant as plants become more complex.
Sporophyte is a Greek term meaning diploid structure (2n) responsible for spore production; present in organisms whose life cycle has alternation of generations. This type of cycle is characterized by presenting two phases, one haploid (n) and another diploid (2n). The alternation of generations is believed to have arisen when the zygote (2n) was divided by mitosis rather than meiosis, resulting in a diploid individual. The alternation of generations is well documented in embryophytes (terrestrial plants) and for some macroalgae (red, green and brown algae). For these organisms the haploid phase (n) is represented by the gametophyte, whose function is the production of gametes; while the diploid phase (2n) is represented by the sporophyte, responsible for spore production. When the phases present morphological differences, which happens in the embryophytes, the life cycle is said to be heteromorphic. While for most algae there are no differences and the life cycle is known as isomorphic.