c. telegraph came before the telephone obvi and the rest are not communication. telegraphs could be sent over seas
Perhaps the most successful way we've been able to use light to transfer information is fiber optics. ... Through rapid changes in the light, you can send highly complex signals down the cable. These are most often used either for high speed internet connections, or for sending sound signals to home theater systems.
Answer:
b. Simple and basic
Explanation:
Electronic cover letters are just the soft copy of the traditional handwritten cover letters. Mostly cover letters are scanned through equipment before it reaches a hiring manager. Hence it is important to make sure that the equipment has no ambiguity in processing the information provided in the cover letter. Having too much formatting and making it colorful and flashy will leave the scanning equipment confused.
Hence the electronic cover letter should be simple and basic.
