Figure 2-1 Refer to Figure 2-1. Which of These Statements Is True

Figure 2-1
Refer to Figure 2-1. Which of these statements is true based on the data provided by the graph?

A) The pH of the solution must be determined algebraically.
B) The pH of the solution is relatively unaffected by the addition of base.
C) The pH of the solution is 7 when approximately 12 mL of base have been added.
D) The pH of the solution is relatively constant with addition of the first 14 mL of base.
E) The pH of the solution rises significantly when the volume is increased from 14 mL to 18 mL.