At the same time, they all contain the letters a, B, C, and the coefficient is 1 A. Four B. five C. six D. seven

At the same time, they all contain the letters a, B, C, and the coefficient is 1 A. Four B. five C. six D. seven

The qualified monomials are Abc3, ab3c, a3bc, a2b2c, ab2c2, a2bc2