Answer:
A - beta[0]
Explanation:
Beta[0] is the first element of the array, therefore automatically it is a valid element of beta. B and C are disqualified because you would not use single quotations when referring to an element. D is disqualified because the element starts at 0 (beta[0]) and has 50 elements declared, therefore it would end at 49, with beta[49] being the last element.
A rotary dial telephone was a popular type of phone design throughout the 20th century. ... This causes the dial to return to its starting position due to an internal recoil spring, while simultaneously generating a series of electrical pulses that interrupt the flow of current on the telephone's line.
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Hope this helps.
Open this occurence and open the series is the two options to choose from, from the dialog box that shows when attempting to modify the appointments
