Identify the correctly written compound sentences. check all that apply. a. the readability of a written document is determined by both sentence clarity and document formatting; use concise language and clear headings to improve the readability of your message. b. every corporation has its own organizational culture; therefore, communication practices will differ slightly from organization to organization. c. the most effective communicators understand the need for accurate, relevant information in professional messages; however, poor communicators often overlook the importance of precise, targeted information. d. in a written document graphic devices the reader understand your message, therefore it is important to be consistent and appropriate in your visual design choices.