【C20】A．restrainB．curbC．decreaseD．lessen

【C18】A．weakenedB．reducedC．diminishedD．decreased

【C2】A．declineB．shrinkC．decreaseD．contract

What does the word "stifled" mean in the third paragraph？A．Aggravated.B．Lessened.C．Suppres

【C9】A．remain stableB．increaseC．keep changingD．decrease

【C5】A．remainB．increaseC．decreaseD．vary

A.emergesB.vanishesC.remainsD.decreases