MathNet 2024-part-05 — 168 problems (EN–VI) Question 133

In how many ways can 6 juniors and 6 seniors form 3 disjoint teams of 4 people so that each team has 2 juniors and 2 seniors?
(A) 720 (B) 1350 (C) 2700 (D) 3280 (E) 8100