Choose the correct usage to complete the sentence: 'The decision is contingent ______ the approval of the governing body.'

Select the most appropriate option to substitute the bracketed segment in the given sentence. If no substitution is required, select 'No substitution required'. She (was excited in) studying corals and, as she puts it, having a conversation with nature.

Fill in the blank with the suitable word: She prefers tea ______ coffee in the evening.