Option d) The church did not just reflect what was happening in society.
Explanation: a thermometer does not influence anything, just measures or reflects the temperature of something. Then the comparisson of the church with the thermometer is to establish whether it merely reflected something or did something else.
The correct answer would be C. THis is because if it is written as (it's) it is a contraction for (it is).
I honestly think that the answer is B
