I don't know if this is correct and I don't really understand this? Can you help me please?

Answer: Choice A is correct
Explanation:
The LCM of the coefficients 14 and 16 is 112 because (14*16)/2 = 112. We multiply the values and divide by the GCF 2.
The 'a' terms are [tex]a^5[/tex] and [tex]a^3[/tex]. We pick the one with the largest exponent when forming the LCM. Go for the smallest exponent when finding the GCF. Similar situations occur with the b and c terms as well.
So that's how we end up with [tex]112a^5b^4c^2[/tex] as the LCM.
Side note: Choice D is the GCF of the two given expressions.