* The SOQL query assigns its result directly to a single sObject variable (Account myAccount). If the query returns more than one record, Salesforce throws a QueryException because the system cannot automatically cast multiple results to a single sObject.
* Not Suitable:
* Option A: The variable cannot be automatically cast to a list.
* Option C: The query itself does not fail but throws an exception.
* Option D: The first record is not automatically assigned.