$7 \mathrm{i}(4-7 \mathrm{i})$ A) $28 i-49 i^{2}$ B) $49+28 \mathrm{i}$ C) $28 \mathrm{i}-49$

Multiple Choice

$7 \mathrm{i}(4-7 \mathrm{i})$

A) $28 i-49 i^{2}$
B) $49+28 \mathrm{i}$
C) $28 \mathrm{i}-49$
D) $28 i+49 i^{2}$