ReadingComp-Quiz-14 (Explanation)

If browsing for whole heads of lettuce, turn over and inspect the base; it should show only the slightest signs of browning. Press a fingernail into the base of a leaf. If some liquid oozes out, that means the leaves are fresh and juicy. A few slightly wilted leaves on the outside are not a problem, but if the whole head is droopy, pass it up.

Now you know the steps to take when shopping for greens.

The purpose of this passage can best be described as ___________________.