Let A = pqr, B = pqs, C = prs, D = pqs, and E = pqs, where p, q, r, and s represent meaningful statements. Determine whether A BC DE is a tautology.

Let A = p∨q∨¬r, B = p∨¬q∨¬s, C = p∨¬r∨¬s, D = ¬p∨¬q∨¬s, and E = p∨q∨¬s, where p, q, r, and s represent meaningful statements. Determine whether A∧ B∧C ∧ D∧E is a tautology. Explain your answer

I have tried to use the and truth table. I got stuck cause there are 4 meaningful statements. Many thanks!