Which could most likely describe the three surfaces?
chen is testing the friction of three surfaces. he pushes the
same ball across three different surfaces with the same
force and measures the distance of each ball. the ball
moved ten inches across surface 1, six inches across
surface 2, and fifteen inches across surface 3.
surface 1 is ice, surface 2 is gravel, and surface 3 is
blacktop.
surface 1 is gravel, surface 2 is ice, and surface 3 is

after a more than a decade and a half of combating al qaeda (aq) in afghanistan and pakistan,

the united states faces a diverse array of threats from al qaeda affiliates in the middle east and

africa. while senior al qaeda figures reportedly remain based in pakistan, the network includes

a number of affiliates across the middle east and africa including al qaeda in the arabian

peninsula (aqap), al qaeda in the islamic maghreb (aqim), and al shabaab. al qaeda also

retains a small but possibly growing presence in afghanistan. u.s. officials have stated that al

qaeda still maintains a foothold in syria through its ties to hay’at tahrir al sham (formerly

known as the nusra front), though the exact nature of that relationship may be evolving. this

report examines the threat posed by al qaeda affiliates in the middle east and africa as described

by u.s. officials and outside observers, as well as the u.s. approach to date in responding to these

threats. this was all i could find hope this : )

to replace ineffective because   andrew jackson's spoil system was a deliberate policy after he became president to remove federal employees he considered to be political opponents and replace them with his own supporters.

the answer is b. i did this test and got it right.