Question

the topic sentence below is...
thesis
bike - sharing programs are the most economical way for city governments to reduce traffic.
topic sentence
over the past decade, the number of americans biking to work each day has increased by 60 percent.
strong weak: not a claim weak: off topic
weak: redundant

Explanation:

The thesis is about bike - sharing programs being an economical way to reduce traffic. The topic sentence gives a statistic about the increase in Americans biking to work. It doesn't relate to the thesis's claim about being economical or reducing traffic for city governments, so it's off - topic.

Answer:

Weak: Off Topic