Which of the following is the correct expanded form of ?
a. 3 ∗ ∗ ∗ ∗ ∗

b. 3 ∗ ∗ ∗ ∗

c. 3 ∗ ∗ ∗ ∗ ∗

d. 3 ∗ ∗ ∗ ​