Answer:
Option C)
![\text{GCF} = 14fg^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/sk0hvwncwfv93r3re112y0s4vxljvdwzbq.png)
Explanation:
We are given the following:
![56f^3g^2 \text{ and }70fg^3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/l4hnvxyza39zecyn1y6uw8mmlbg49t4ydm.png)
We have to find the greatest common factor of the two expressions.
We will use the technique of prime factorization to do so:
![56f^3g^2\\\\=2* 2* 2* 7* f* f* f* g* g\\\\70fg^3\\\\=2* 5* 7* f* g* g* g](https://img.qammunity.org/2020/formulas/mathematics/middle-school/ema2qyno5p4mxvr5gi9aivqi2v8hx8fi8i.png)
The common factors of both expressions are:
![\text{Common factors} = 2* 7* f* g* g](https://img.qammunity.org/2020/formulas/mathematics/middle-school/22jsgh7fppx3aa7qtgj9cnmp6iwnceg6ma.png)
Thus, the greatest common factor is:
![\text{GCF} = 14fg^2](https://img.qammunity.org/2020/formulas/mathematics/middle-school/sk0hvwncwfv93r3re112y0s4vxljvdwzbq.png)
Option C) is the correct option.