Before a company can sell a new drug, they have to ............. tests and trials to make sure it’s safe. a) conduct b) provide c) invent d) proceed

To answer this question, we need to select the most appropriate word that fits in the context given.

Analysis of Options

1. Conduct: This means to carry out or manage activities. In the context of tests and trials, this is a suitable choice because companies conduct tests to determine safety.

2. Provide: This means to supply or make available. While it could relate to giving information or resources, it isn’t specifically about performing tests.

3. Invent: This means to create something new. This doesn't fit the context as it does not relate to testing but to the creation of the drug itself.

4. Proceed: This means to begin or continue a course of action. It doesn’t capture the essence of carrying out tests.

Final Answer

The correct answer is a) conduct. Therefore, the complete sentence would read: "Before a company can sell a new drug, they have to conduct tests and trials to make sure it’s safe."