#### Answer

B

#### Work Step by Step

Find the greatest common factor. Find the factors of each term and multiply the factors that are common to all the terms.
$35n^4=\underline7\times5\times\underline n\times\underline n\times n\times n$
$14x^2=\underline7\times2\times\underline n\times\underline n$
GCF=$7\times n\times n=7n^2$