Answer:
a trial period in which a student can bring up his grades
Step-by-step explanation:
pro·ba·tion·ar·y
/prōˈbāSHəˌnerē/
adjective
relating to a process of testing or observing the character or abilities of a person who is new to a role or job.
a period in which a person's fitness for work is tested
this is always a period of time to determine the fitness of the applicants
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