There is no doubt that to succeed in online education, one must know how to use this skill is at the heart of online learning.
a. technology
b. critical thinking
c. dantes
d. skype

Part of me says A, but the other says B... if it were me, I would pick B

Iwould focused driving is not a common sign.

Hypothesis: volumes of both figures are equal.the volume of  figure 1 is: .the volume of figure 2 is: .since , you can conclude that and . so, .volumes of figures are equal only when an angle in the basis is right (then figures will be the same), in another cases volume of figure 1 is less than volume of figure 2.the hypothesis was not correct in all cases.