Final answer:
Richard I likely wanted to marry Berengaria of Navarre instead of Philip's sister, Alice, for strategic political alliances during the Crusades, rather than any reason related to romantic affection, opposition from Philip, or Berengaria's wealth.
Step-by-step explanation:
The question as to why Richard I wanted to marry Berengaria of Navarre, rather than Philip's sister, Alice, pertains to historical alliances and the diplomatic affairs of the time. The most probable reason for Richard's choice was political alliances (Option A) formed during the Crusades, in which Richard I saw an opportunity to secure additional support for his military campaigns. There's little historical evidence of romantic affection playing a significant role in the marriage. Rather, such royal marriages were typically orchestrated to solidify alliances, gain territorial advantage, or produce heirs. Given that Berengaria accompanied Richard on the Third Crusade and there is no substantial record of active opposition from Philip, it is reasonable to deduce that the marriage was strategic. Berengaria's dowry or wealth may have been a factor, but it is not commonly cited as the primary motive for the marriage. Thus, the reason was likely political in nature.