Which sentence shows an appropriate and correctly punctuated relationship between clauses?
a) the students are studying because, they have a test tomorrow.
b) the students are studying, because, they have a test tomorrow.
c) the students are studying because they have a test tomorrow.
d) the students are studying; because they have a test tomorrow.
provide explanation with answer, if possible.

The sentence that shows an appropiate and correctly punctuated relationship between clauses is the following:

C, The students are studying because they have a test tomorrow.

The punctuation should not break the relationship between a conjunction and the clause it introduces. Thus, A and B display an incorrect punctuation as they place a comma between because and the clause "they have a test tomorrow".

Furthermore, punctuation marks should not separate the primary clause, in this case "The students are studying", and the conjuction "because", which is the error on both B and D. One can use semicolons with other conjuctions, like adversative conjunctions but not with the subordinating conjunction "because".

i believe that's the correct answer