Which of the following can produce a toxin that leads to toxic shock syndrome?

The band of radiation with a wavelength between 180 and 400 nm is

A) visible light B) X-ray C) infrared D) ultraviolet

What is the maximum length for valve spacing in high-value districts as recommended by Commercial Risk Services, Inc?

A. 100 feet (30 m) B. 200 feet (60 m) C. 300 feet (90 m) D. 500 feet (150 m)