White, rounded, or oval ulcerations surrounded by a red halo and found on the oral mucosa are

a. fordyce spots.
b. aphthous ulcers.
c. stensen ducts.
d. leukoedema.
e. angular cheilitis.

Which statement supports the principle ideas of jean piaget's philosophy? adults should not interact with teachers. children are best educated through standardized training. adults do not think better than children, but they think differently. children should not form hypotheses until they are certain their findings will be correct.