Multiply the Expression Using the Product Rule $$4 ^ { 8 } \cdot 4 ^ { 6 }$$

Multiply the expression using the product rule.
- $$4 ^ { 8 } \cdot 4 ^ { 6 }$$

A) $16 ^ { 48 }$
B) $4 ^ { 48 }$
C) $16 ^ { 14 }$
D) $4 ^ { 14 }$