In the New England colonies, (a) long winters, short summers, heavily

In the New England colonies,

(a) long winters, short summers, heavily forested areas, and rocky terrain contributed to a lack of productive farmland; agriculture was a difficult, marginal activity.
(b) the great majority of New Englanders engaged in some type of subsistence agricultural activity.
(c) most New England farmers subsidized their farm income with some other type of income from another occupation to support themselves, save and invest.
(d) all of the above are true.

ANSWER

(d)