Write the next sentence in the following story.

How to grow butternut squash
Plant once the soil has warmed.
Butternut squash seeds won't germinate in cold soil, so it's necessary to plant them once you're certain the last frost has passed. In warmer climates this could be in mid-spring, and in cooler climates you might have to wait until late spring.

OPT:
(A). If the soil feels gritty or too dry, the butternut squash seeds won't germinate. In that case, you may need to transplant the squash.;
(B). Outdoor varieties of butternut squash may germinate in damp, sandy soil without a frost. You can find butternut squash seeds online and in specialty garden supplies stores.;
(C). If you plant your squash too early, it won't survive. If you want to get a head start, you can start the seeds indoors up to 3 weeks before the last frost.;
(D). While ripe butternut squash seeds should be harvested before the last frost, immature butternut squash will be ready to harvest soon after the last frost. Moisten the eggshell or root portion.;. The answer should be
(C).