Determine whether each thesis statement is weak or strong.
a. The number of homeless citizens in the United States has recently increased. [Choose]
b. The jeans industry targets its advertisements to appeal to young adults. [Choose]
c. Smoking should be outlawed because it causes many problems, such as breathlessness and lung disease. [Choose]
d. The invention of vaccinations has had a major effect on humans by wiping out a number of deadly diseases. [Choose]
