I believe the answer is B. Biographies and histories. (Otherwise its D)
It can be noisy and distracting to students to listen to audio speakers when there are multiple computers in the classroom. Headphones help the students
The answer is Insert Tab. This is the button to add a picture to a spreadsheet. <span>Click </span>Insert to add something to a spreadsheet. This includes pictures, shapes, charts, links, text boxes, video and more. <span>The </span>Insert Tab<span> is used to </span>insert<span> different features such as tables, pictures, clip art, shapes, charts, page numbers, word art, headers, and footers into a document. </span>
Professional development is learning to earn or maintain professional credentials such as academic degrees to formal coursework, conferences and informal learning opportunities situated in practice. It has been described as intensive and collaborative, ideally incorporating an evaluative stage.[1] There are a variety of approaches to professional development, including consultation, coaching, communities of practice, lesson study, mentoring, reflective supervision and technical assistance.[2]