Which word does the underlined clause modify?

my grandfather wears a baseball cap whenever he leaves the house.

a. wears
b. baseball
c. grandfather
d. cap

one time i was sleeping on a bench outside of walgreens and someone offered me money because they thought i was homeless

explanation:

the answer is: tabard inn, southwark.

in "the canterbury tales," by geoffrey chaucer, the twenty-nine diverse group of pilgrims is staying at a tavern in southwark, london, as they are traveling to canterbury. they wish to visit the relics of saint thomas becket in canterbury   cathedral in order to him for his when they underwent necessities.

im pretty sure a would be the answer