Answer:
Because I remembered to study
Step-by-step explanation:
A subordinate clause allows you to add extra information to a simple sentence using subordinating conjunction to turn it into a complex sentence.
The subordinate clause always depends on another clause for its full meaning. The subordinating conjunctions show the relationship between the two clauses.
Therefore this shows that : ' because I remembered to study ' is the subordinating clause as it adds extra information on how the person aced there test.