Mwangi wants to download songs and lectures on his smartphone. He plans to download at least 30 songs and lectures (condition A), but he can download at most 300 megabytes of data (condition B)
The graph represents the constraints on the number of songs S and lectures L Mwangi downloads.
Answer choices:
A:15 lectures at most
B:20 lectures at most
C:30 lectures at most
D:60 lectures at most