Fernando 希望通过月结算方式支付。每月最低开销是多少？

The correct answer is "过去 12 个月中的其中 2 个月，每月最低消费 3,000 美元" (a minimum spend of $3,000 in at least 2 of the past 12 months) because this is LinkedIn's specific eligibility requirement for advertisers to qualify for monthly invoicing. This option accurately reflects the financial commitment LinkedIn expects for this payment method, which is typically offered to larger advertisers. The other options are incorrect because they either state a different, inaccurate minimum spend ($1,000 or $5,000) or incorrectly claim there is no minimum, which is not true for monthly invoicing on LinkedIn.