Which of the following is an example of centration?
a. a young girl can't write her name.
b. a kindergarten child is unable to recognize whether a group of blocks contains more wooden ones or more round ones.
c. a five-year-old can't color within the lines of a given picture.
d. a young boy can recite his favorite story.

*edit* i took the test and i picked a and it was incorrect for its c! rank the following suggestions for preventing std, in order of increasing effectiveness. 1) using latex condoms properly 2) using spermicidal foam or jelly with a monogamous partner 3) abstaining from sexual intercourse and genital contact a. 1, 2, 3c. 2, 1, 3