Citation is elucidated as the acknowledgment of a source that has been referred to in the text in order to establish the credibility of the work and avoid plagiarism.
As per the MLA guidelines, <u>in-text citations</u> follow a format in which the author's last name is followed by the page number and these are together enclosed in parentheses. Thus, <u>option A</u> i.e. (Jennings 88) follows this format where the last name of the author('Jennings') correctly precedes the page number(88).
This is because of the name itself -- a "group" project. It's not a "solo" or an "alone" project. You are responsible for the other people's work in your group. It is important to make sure everyone contributes their own work in a group project, and not someone else's.
"Do what you can with all you have, wherever you are." -- Theodore Roosevelt. "Being happy doesn't mean you're perfect. It just means you've decided to look beyond the imperfections." -- K.B. Indiana.