A temperature unit holds the temperature between 10 degrees Celcius and –10 degrees Celcius. If
the temperature drops below –10 or rises above 10 then an alarm rings. Boundary Value Analysis
tests are drawn up using the approach of two test cases per boundary. The temperatures to be
tested are:

A.
11, 10, -11, -10

B.
11, 10, 9, -11, -10, -9

C.
11, 9, -9, -11

D.
10, 9, -9, -10

Explanation: