单选题 《复合题被拆开情况》 If you’re a small or online business owner, chances are you need solid marketing to promote your brand and increase traffic to your website. In the past, marketing campaigns (营销活动) needed a large budget to be successful, but today there are many advertising ideas you can choose for free. Here are two free business advertising ideas. 1. Create a Website If you’re trying to advertise your business for free, creating a website is the very first step you need to take. Having a website will help customers find your business through search engines like Google. Fortunately, it doesn’t take much time and you don’t need any coding or design skills. 2. Email Marketing Email marketing is one of the first free advertising routes you should try. The main email marketing strategies (策略) you can use are newsletters (通讯) and email marketing campaigns. You’ll first need to build an email list. You can do this by including a sign-up form on your website so that you can send your newsletters to them. Once you have an email list, you can send emails about new offerings or newsletters to promote your new content.《问题》：What was needed to make marketing campaigns succeed in the past?