James 的受众规模大，但投放量低。他如何提高投放量？请选择三个答案。

James is experiencing low delivery despite a large audience, indicating an issue with how his ads are being shown, not necessarily the audience size itself. Checking content ensures the ads are engaging and relevant, which improves ad quality and delivery. Reviewing the bidding strategy is crucial because an ineffective strategy can limit ad impressions even with a large audience. Similarly, checking the bid amount directly impacts delivery; a bid that is too low will prevent ads from winning auctions and being shown. Using AND-OR functionality is for refining audience targeting, not directly increasing delivery for an already large audience. Enabling the broad delivery tool would expand the audience, but James's problem is low delivery within his existing large audience, not a lack of audience size.