Multi-choice problem: Continue writing the next sentence in this paragraph:

How to grow violets
Determine your hardiness zone.
Violets can grow in a wide variety of climates, but they might not be possible to grow in your area. Violets grow in hardiness zones 5-8.

Pick from:
(A). To determine your hardiness zone, visit the garden center website for specific instructions. Most plants grow best in zones 5-8.
(B). In order to know your zone, look at where you live. Some states automatically maintain hardiness zones 7-8.
(C). These zones are based on average annual temperatures, and the lower the number, the colder the climate. To check your hardiness zone, visit.
(D). These boundaries are regulated by the u.s. department of natural resources, making them vital to growing violets.
(C).