IMO, this example is a kind of command subjunctive, wherein, the word suggests means almost to advise or give some kind of imperativeness as may be in a tuition or exercise class; Depending upon where it comes from, suggestion can be a mandate, such as when the Supreme Court or the Fed suggests something, it is rather an order than a request. Looked from that angle, the verb is not used as in an indicative mood, but in a subjunctive mood. So, in the use of subjunctive mood, verbs like can decide
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