Which is grammatically correct?
a. Sue enjoyed the lunch at Jamey's restaurant : eating two portions of rice and cheese.
b. Sue enjoyed the lunch at Jamey's restaurant ; eating two portions of rice and cheese.
c. Sue enjoyed the lunch at Jamey's restaurant , eating two portions of rice and cheese.
Note, the sentence is the exact same, except for the punctuation, do I need to punt a colon or semicolon or a comma ?