I believe the answer is the O he had a homeless person in a trailer in a yard for a month
When could is used it refers to an ability that <span>a person generally had in the past or to something that was generally possible in the past, can is present.
I could wash the dishes for you. (having the ability to do it)
I can wash the dishes for you. (its actually going to be done)
hope this helps you! :-)</span>
<span>The answer is B and D. Overpopulation is among the most squeezing ecological issues, noiselessly exasperating the strengths behind an unnatural weather change, ecological contamination, living space misfortune, the 6th mass termination, escalated cultivating rehearses and the utilization of limited normal assets, for example, freshwater, arable land and non-renewable energy sources</span>
