Which sentence uses a verb that agrees with its compound subject?

a.
maples and oaks drops their leaves in the fall.

b.
basketball and handball is played on hard courts.

c.
baseball or soccer are my sister's favorite sport.

d.
subways and buses carry passengers in many cities.

Carlo is wondering what causes plants to grow at different rates. carlo’s hypothesis is “plants will grow more when the day is longer.” what would be the difference between the test group and the control group in this experiment? type of soil type of plants exposure to sunlight method for measuring the growth

In an ecosystem, marsh snails feed on phytoplankton and painted turtles feed on marsh snails. pollution has resulted in the depletion of phytoplankton. what effect would this situation likely have on the population of marsh snails and painted turtles? as phytoplankton were destroyed, the population of marsh snails would most likely then the population of painted turtles would mostly likely a. 1. increase 2. decrease 3. stay the same b. 1. increase 2. decrease 3. stay the same

How do you work out 21.3-8= show your working. plz