Answer: D. 3b2 + 2b ≥ 56
Explanation:
Here b represents the number of boxes she purchase in upcoming year,
Since, The number of markers in each box = two more than three times the number of boxes she purchased for this upcoming school year.
Thus, the number of markers in each box = 3b + 2
⇒

According to the question,
The total number of marker in upcoming year ≥ 56
⇒
