Passage Three Questions 33 to 35 are based on the passage you have just heard.

A．Providing aid to the disabled
B．Selling products made for left-handers.
C．Promoting products for manufacturers
D． Printing labels for manufactured goods.

A．They are looked after by animal-care organizations.
B．They sacrifice their lives for the benefit of humans.
C．They look spotlessly clean throughout their lives.
D．They are labeled pet animals by the researchers.