2. Which of the following would Japan not want to do to resolve the problem of its aging population and
labor shortage?

a. Provide financial incentives for families to have
more children.
b. Encourage more women to enter the labor
force.
c. Allow immigration of other ethnic groups.
d. Increase the retirement age.
e. Build more retirement homes.

Some gamma ray bursts are hypothesized to come from mergers of neutron stars or black holes. if this hypothesis is correct, what else should we in principle be able to detect from such mergers? a. gravitiational waves b. x-ray bursts c. significant disruption of gas thousands of light-years away in the surrounding galaxy d. an "afterglow" of bright visible light, lasting for weeks