Final answer:
Christopher Columbus was friendly to the islanders by providing gifts, establishing trade agreements, and sharing some advanced technology, which is reflected in the answer 'All of the above'.
Step-by-step explanation:
Among the actions Columbus took that indicated a friendly approach to the islanders, he provided gifts such as red caps and strings of beads, as described in his journal. He noted the natives were friendly, which encouraged peaceful interaction and established trade agreements, exchanging European trinkets for items native to the Caribbean. Columbus and his men shared advanced technology with the islanders in some respects, such as showing them swords, although this interaction led to the islanders cutting themselves due to unfamiliarity with the objects.
In summary, his friendly acts towards the islanders were varied, encompassing gifts, establishing trade, and sharing some aspects of European technology. Thus, the correct answer reflecting Columbus's actions would be D) All of the above.