Sure, let's work through the problem step-by-step:
1. Add the first two numbers:
[tex]\[
2.1 + 3.32 = 5.42
\][/tex]
2. Subtract the third number from the result of the addition:
[tex]\[
5.42 - 1.4 = 4.02
\][/tex]
Therefore, the correct answer is:
A) 4.02
So, the selected option is A) 4.02.