Final answer:
The perspective on the past in 'Mezzo Cammin' suggests regret and missed opportunities.
Step-by-step explanation:
In the poem 'Mezzo Cammin,' the speaker reflects on their past and the choices they have made in life. The perspective on the past suggested by the poem is A) Regret and missed opportunities. The speaker expresses a sense of disappointment and regret for not fully seizing opportunities and achieving happiness and fulfillment.