A developer wants to mark each Account in a List<Account> as either or Inactive based on the LastModified field value being more than 90 days. Which Apex technique should the developer use?

A `switch` statement is used for multiple branches based on a single value, typically an Enum, Integer, SObject type, or String, not for complex conditional logic involving date comparisons that require an `if/else`.

The `switch` statement is not suitable for this conditional logic, and embedding a `for` loop within a `switch` statement does not make sense for this problem.

While an `if/else` statement is crucial for conditional logic, it must be enclosed within a `for` loop to process each `Account` in the `List<Account>`. An `if/else` statement on its own would only apply to a single record or condition.

A `for` loop is necessary to iterate through each `Account` record in the `List<Account>`. Inside the loop, an `if/else` statement allows the developer to check the `LastModified` field of each account and apply the 'Active' or 'Inactive' status based on the 90-day condition.