Determine if b is a linear combination of a₁, a2, and a3. 4 9 4 2 a₁ 2 BHOMEMAH 5 13 4 Choose the correct answer below. ○ A. Vector b is a linear combination of a₁, a2, and a. The pivots in the corresponding echelon matrix are in the first entry in the first column, the second entry in the second column, and the third entry in the third column. ○ B. Vector b is not a linear combination of a₁, a2, and 23. OC. Vector b is a linear combination of a₁, a2, and a3. The pivots in the corresponding echelon matrix are in the first entry in the first column and the third entry in the second column, and the third entry in the third column. ○ D. Vector b is a linear combination of a₁, a, and a 3. The pivots in the corresponding echelon matrix are in the first entry in the first column, the second entry in the second column, and the third entry in the fourth column.