Final answer:
The described disability insurance that begins within 30 days and provides salary for a short duration is short-term disability insurance, which typically ends after 1-2 years. So, the correct answer is option a.
Step-by-step explanation:
The type of disability insurance described in the question is short-term disability insurance. This type of insurance begins within or at 30 days of an incident and provides salary compensation for the insured individual who is unable to work due to a disability.
The benefits from short-term disability insurance typically end after approximately 1-2 years, as its main purpose is to cover a period during which the individual cannot work but is expected to recover.
It is distinct from unemployment insurance, which compensates individuals who lose their jobs and are looking for new employment, and from Social Security disability insurance, which requires a disability expected to last at least twelve months or result in death.