Which of the following does **NOT** have an answer in the text?
A survey asked 100 teenagers: "How often do you use your phone for calling?" The results are shown below.
"I call my friends every day." - 40 teenagers
"I call my family once a week." - 35 teenagers
"I rarely call anyone." - 25 teenagers
A)How many teenagers call their friends every day?
B)How many teenagers call their family once a week?
C)How many teenagers never use their phone?
D)How many teenagers rarely call anyone?