tv program vs study

tv program vs study

B: pass my exam
D: study for my exam
A: effectively use my time
B-D:Assumption(s)Injection(s)
to pass my exam requires study
C: have quality time with my family
D': spend time with my family

In order to effectively use my time I must pass my exam and in order to pass my exam I must study for my exam . But, in order to effectively use my time I must also have quality time with my family and in order to have quality time with my family I must spend time with my family. I can't both study for my exam and spend time with my family.

RelationAssumption(s)Injection(s)
B-Dto pass my exam requires study