Correct option is A
Explanation:
The correct answer is may.
The modal "may" is used to express possibility. The sentence "He may come today" suggests that there is a possibility of him coming today, without confirming it as certain.
Information Booster:
"May" is commonly used to indicate:
Possibility: "It may rain later."
Permission: "May I leave early today?"
"May" is a modal verb that allows the speaker to indicate that something is uncertain but possible.
Additional Knowledge:
(but) is a conjunction used to introduce a contrast, not a modal verb. Example: "I wanted to go, but I was too tired."
(because) is a conjunction used to give a reason, and it does not fit in this context. Example: "He stayed home because he was sick."
(as) is a conjunction used to indicate a relationship of time or manner, not a modal verb. Example: "She sings as beautifully as a bird."