As used in the text (Para. 6) the word "petty" most probably means______.

A．is satisfied with present relationships between home and school
B．feels that traditional program in mathematics is highly superior to the developmental program
C．feels that parent-teacher interviews can be made much more constructive than they are at present
D．is of the opinion that teachers of this generation are superior to those of the last one

A．home training is more important than school training in that a child spends so many hours with parents
B．teachers can and should help parents to understand the objectives of the school
C．parents need to realize how to cooperate with the teachers in educating their children
D．parents have unconsciously hindered and obstructed curricular objectives