Overexpression of cryptochrome C-terminal region alone causes plants to:
Show cop mutant-like phenotype (B) is correct here. This is core cryptochrome: once you know the definition or pathway step, Show cop mutant-like phenotype is the clear fit. The wrong ones are A) Behave like dark-grown seedlings; C) Lose photomorphogenesis; D) Fail to germinate. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.