Q688161 - CESGRANRIO - 2018 - Petrobras - Químico de Petróleo Júnior,

Based on the meanings in Text I, the two items that express synonymous ideas are

a)
channel (line 12) - hinder
b)
stark (line 16) - dubious
c)
stem (line 23) - restrain
d)
pledged (line 38) - refused
e)
bold (line 69) – fearful