ANSWER
A. 30x²y²
Step-by-step explanation
First, we have to find the LCM for the coefficients. Note that 30 is a multiple of 10, so their LCM is 30.
Then, we have to take a look at the variables. If one variable appears in just one of the polynomials, then that is part of the LCM - in this case, y². If a variable appears in both polynomials, the LCM will have the variable once, but raised to the highest exponent of the two - in this case, x².
Hence, the LCM is 30x²y².