This was an easy choice for me. With a title like Wildflowers, Cover A fails to convey what the book is about.
Cover B shows a child finger-painting, much more appropriate for this genre of book.
Need to see the child...before looking at imagined a cover...then saw one very close to my imagining...absolutely B
Ditto about Cover B. I also like the coloring. I chose my cover from Outskirts library using a similar format and color. The cover has been actually raved about and considered by buyers to be the attraction in wanting the book. But of course, as readers, their reviews have also been very good. Stick to what attracts the readers to buy your book. Good luck. I will look forward to reading your story.
B with the child on the front reflects the book's subject matter more. I like bright colors.