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144) If \( A=\{3,5,7,9,11\} \) and there are 6720 injective functions \( f: A \rightarrow B \), what is \( |B| ? \) A) 5 B) 6 C) 7 D) 8

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144) If \( A=\{3,5,7,9,11\} \) and there are 6720 injective functions \( f: A \rightarrow B \), what is \( |B| ? \) A) 5 B) 6 C) 7 D) 8
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Correct answer=d
by (80 points)
Explain plz
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