Answer: A. It pulled out the dive at the last minute.
In "Pilgrim at Tinker Creek," the author describes the flight of a mockingbird. The author explains that the mockingbird appeared to be about to crash into the ground. However, at the last moment, he unfurled his wings and pulled out the dive at the last minute. The author appears to be amazed at the precision with which the mockingbird achieves this feat.