Which of the following methods involves collecting data from written reports or other artifacts in order to discover patterns in behavior/attitudes dating to an earlier time period?

Historical Method.

Explanation:

Historical method is a technique of studying and understand the past that has occurred by collecting the artifacts and written documents from that period. By examining the collected materials, one can discover the patterns of culture, art, and society of that period. Majority of the time sites of the ancient civilizations has helped the historians to identify the period.

offline recommendation systems option b

because recommendation systems produce a list of two ways

1. through collaborative filtering

or

2. through content-based filtering