An agreement that occurred in 1972 is correctly
described with the past tense verb reduced. Since
the dumping continued after the date of the
agreement, the past perfect verb had been allowed
should instead be the present are allowed (if the
agreement remained in eff ect when the sentence
was written) or the past were allowed (if the
agreement was no longer in eff ect when the
sentence was written). Since were allowed does not
appear in any of the options, we can assume that
the correct verb tense
...
described with the past tense verb reduced. Since
the dumping continued after the date of the
agreement, the past perfect verb had been allowed
should instead be the present are allowed (if the
agreement remained in eff ect when the sentence
was written) or the past were allowed (if the
agreement was no longer in eff ect when the
sentence was written). Since were allowed does not
appear in any of the options, we can assume that
the correct verb tense
...







