Read the given statement and conclusions carefully. Assuming that the information given in the statement is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statement.

Statement: Insufficient sleep is the major cause of swelling under eyes.

Conclusions:

(I) A good night's sleep leads to increase in memory and concentration.

(II) People who get sufficient sleep never have swelling under the eyes.