In what year did Iota Phi Theta become a member of the NPHC?

Iota Phi Theta became a member of the National Pan-Hellenic Council (NPHC) in the year 1996. This year is significant because it marks the inclusion of Iota Phi Theta, the newest historically Black Greek-letter organization established in 1963, into the umbrella of the NPHC, which consists of historically Black fraternities and sororities.

This affiliation with the NPHC allowed Iota Phi Theta to participate officially in the collective efforts of the member organizations toward community service, scholarship, and cultural enrichment. Being a part of the NPHC also provided Iota Phi Theta with a platform to forge friendships and collaborate with other sororities and fraternities that share common values and missions.

The other years listed do not correspond to Iota Phi Theta's official membership in the NPHC, making 1996 the correct answer.