Answer:
<em>The dictionary says it was </em><em>Thomas Edison</em><em> who put hello into common usage. He urged the people who used his phone to say "hello" when answering. His rival, Alexander Graham Bell, thought the better word was "ahoy"</em>
Explanation:
<h2><em>HOPE IT HELPS^^</em></h2>
关心 would be a better choice
担心 means worry
关心 means like he care for you something like that