Answer:
the second factor is 2x+3
Second option is correct.
Step-by-step explanation:
The given polynomial is 
One factor of polynomial is 
It means that this factor completely divide the polynomial and the quotient would be the second factor.
Therefore, second factor is given by

Numerator can be factored as

Hence, the second factor is

Cancel the common factor from numerator and denominator
the second factor is 2x+3
Second option is correct.