Multiply the Polynomials Using a Special Product Formula $( 2 x + 1 ) ^ { 2 }$

Multiple Choice

Multiply the polynomials using a special product formula. Express the answer as a single polynomial in standard form.
- $( 2 x + 1 ) ^ { 2 }$

A) $4 x ^ { 2 } + 1$
B) $4 x ^ { 2 } + 4 x + 1$
C) $2 x ^ { 2 } + 1$
D) $2 x ^ { 2 } + 4 x + 1$