Reading between the lines I realised that my friend wanted to keep something from me.

Options

A. looking for meanings that are not actually expressed
B. reading carelessly
C. reading with anxiety
D. glancing over the lines

Answer

A

Explanation

reading between the lines : looking for or discovering a meaning .
Reading between the lines of the letter, she realised that her friend was in great trouble. The best option is looking for meanings that are not actually expressed.