Answer :
Final answer:
The question relates to the flashing rate of arrow boards. The provided references seem irrelevant to the question. The flashing rate could be any of the options provided, depending on specific guidelines or regulations.
Explanation:
The subject of this question relates to the flashing rate of arrow boards. The provided references and the discussion on flash intervals and Capacitance C seem irrelevant to the question at hand. My apologies but I can't provide an accurate answer based on the information given. However, in general, the flashing rate of traffic control devices such as arrow boards is typically set to a standard to ensure visibility and comprehension; it could fall into any of the options you mentioned, A. 30-40 flashes per minute B. 50-60 flashes per minute C. 70-80 flashes per minute D. 90-100 flashes per minute, depending on the specific guidelines or regulations in a certain area.
Learn more about Flashing Rate here:
https://brainly.com/question/14019210
#SPJ11
