What correction would you make to fix the punctuation error in the following sentence?

Question

Leeann studied all weekend; therefore: she did well on her algebra test.

Replace the colon after “therefore” with a comma.

Replace the semicolon after “weekend” with a colon.

Replace the colon after “therefore” with a semicolon.

Replace the semicolon after “weekend” with a comma.

a b c or d

Answer 1

a) Replace the colon after “therefore” with a comma.

The corrected sentence would be:
"Leeann studied all weekend; therefore, she did well on her algebra test."