At cuppamher, a paper carton manufacturing company, only the factory workers who meet their daily targets are eligible for the monthly bonuses that are disbursed along with their salaries. in the context of reinforcement theory of motivation, which of the following intermittent reinforcement schedules does this scenario best illustrate?

a) a fixed interval reinforcement schedule
b) a fixed ratio reinforcement schedule
c) a variable interval reinforcement schedule
d) a variable ratio reinforcement schedule