Which of the following issues was the worst problem caused by early surface rail systems?
a.
they were too expensive for most people.
b.
they created the first major pollution problems in cities.
c.
they created gridlock with other traffic on crowded city streets.
d.
they were incompatible with rail systems between cities.

Drag each label to the correct location on the image.the diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which sare at their highest and most active.progesteronelevels highestrogen levelsconsistently riseluteinizinghormone levelshighdeveloping follicleoocytemature egg

In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d

Astate's representation in the u.s. senate is based on a) equal representation. b) the state's population. c) the state's electoral votes. d) the size of their major cities.this independent regulatory agency was created in 1974 to oversee and regulate the financing of political campaigns in the united states. a) warren cthis independent regulatory agency was created in 1974 to oversee and regulate the financing of political campaigns in the united states. a) warren commission (wc) b) federal election commission (fec) c) equal opportunity commission (eoc) d) securities and exchange commission (sec)