When considering best practices for searches in Splunk, it's important to follow specific guidelines to ensure efficient and effective search results. Always selecting the time range prevents unnecessary data processing by narrowing down the data set to the relevant period. Specifying index values helps in directly targeting the relevant datasets, improving the speed and accuracy of searches. Inclusion is generally better than exclusion because it's usually more efficient to specify what you're looking for rather than what you're not. Keeping search terms specific helps in refining results, making searches more precise. Including as many search terms as possible (option C) is not advisable as it might lead to overly broad searches, whereas using wildcards like * (option E) indiscriminately can lead to inefficiency and slow searches. Therefore, the best options are selecting the time range, specifying index values, preferring inclusion over exclusion, and keeping search terms specific.