. . . . . . . . you go really? You only arrived an hour ago!

A. Must

B. Can

C. How

D. Should

Answer: Option D

Solution(By Examveda Team)

Both should and must are modal verbs.
'Must' is used when the situation is unavoidable, obligation or a requirement that cannot be avoided.
'Should' is used for advice, requests, recommendation or exceptional mood.
The modal verb is an auxiliary verb that indicates possibility or necessity.