Final answer:
Before 1600, English settlements in North America had both successes and failures, with some failed attempts and some successful colonies established. Option A is correct.
Step-by-step explanation:
Before 1600, the English settlements in North America experienced both successes and failures, which means option A - "some successes, some failures" accurately describes the situation. The English made several unsuccessful attempts at colonization in the 1500s, such as the failed Roanoke Colony in 1587. However, they found success with the establishment of Jamestown in 1607 and Plymouth in 1620. Jamestown was founded for economic purposes, while Plymouth was founded for religious freedom.