In Terms of Their Xylem Cells, Most Gymnosperms Have ____

In terms of their xylem cells, most gymnosperms have ____ while angiosperms have ____.

A) only vessel elements; both tracheids and vessel elements
B) only tracheids; both tracheids and vessel elements
C) only tracheids; only vessel elements
D) both tracheids and vessel elements; only tracheids
E) both tracheids and vessel elements; only vessel elements