The rationing of tires shown in the photograph is most likely to be caused by a) the lack of imported rubber. b) shortages caused by world war ii. c) too many consumers and not enough tires. d) a rubber shortage due to the rubber strike of 1932.

B) Shortages caused by WWII

Since the rubber strike happened in 1936, and there wasn´t too many consumers, and by that time we didn´t import rubber, the only logical explanation is that there was a shortage due to WWII, when america entered the war most of the companies decided and turned to war industry, also many men left their jobs leaving other part of the industry without workers, this caused a shortage in maney products.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering