In this scene, the author's use of situational irony suggests that - B Martha has known that Curtis will begin a new five-year excursion
С Curtis is unaware of Martha and Bigelow's conversation
D During their conversation Martha and Bigelow are unaware that Curtis
has decided to leave

covert: hidden or secret

candid: truthful and straightforward

what i get from these phrases is covert means undercover or underground and that's where the flower is in april. on the other hand, may is the month where flowers start to bloom and thats the reason why candid is being used as a word to describe the blossoming period of a flower.

hope this answer you.

c) eager anticipation.

i cannot see any of the options