Luisa and Elena are twins. They have the same black hair and green eyes. They are exactly the same height. They look so much alike, in fact, that people often say, "I can't distinguish one from the other!" When their mother dresses them in matching outfits, even their family doesn't know which is which! What is the meaning of the word "distinguish" in the passage above?
a. to understand
b. to stay close by
c. to tell apart
d. to start