Choose the correct modal verb:
"You ______ wash your hands before eating."

Correct option is C

Solution- The Correct Answer c. should
The sentence gives advice/recommendation → the correct modal is should.
Could → shows possibility/ability (not suitable here).
Would → shows willingness/habit (not advice).
Might → shows weak possibility (not advice).
Hence, “You should wash your hands before eating” is correct.
Information Booster-
Modal verbs are helping verbs that express ability, possibility, necessity, advice, or obligation.
Common modals: can, could, may, might, shall, should, will, would, must.
Usage in context:
Can → ability (I can swim.)
Must → strong necessity (You must wear a helmet.)
Should → advice (You should exercise daily.)
Additional Information-
Rule: Modals are always followed by the base form of the verb (e.g., should go, must eat, can play).
Exam Tip: Questions often test whether the student knows the difference between “must” (compulsion) and “should” (advice).
Trick: Must = compulsory rule (e.g., traffic rules).
          Should = good advice (e.g., healthy habits).