Which is the best thesis statement?

A、Manyreasonscanaccountforthedifferenceinsubjectselectionsbetweenboysandgirls.
B、Inschoolsanduniversities,girlstendtochooseartswhileboyslikescience.
C、Therearetwomaincausesresponsibleforthedifferenceinsubjectselectionsbetweenboysandgirls：thenaturalstrengthsofeachgenderandthetraditionalbelief.
D、Itisundeniablethatscientificdomainsofstudyseemtobepreferredbyschoolboyswhilstschoolgirlsareinclinedtoshowfancyforonesrelatedtoarts.