Answer: • by determining the central idea of each paragraph
• by identifying the most important details used to support the central idea of each paragraph
• by summarizing the central idea and key details of each paragraph in a single sentence
• by finding the common element among the central ideas throughout the text.
Step-by-step explanation:
A reader can trace how an author develops a central idea throughout a particular text by making sure that the central idea in each paragraph is determined, making a summary of the central idea in every paragraph.
Also, this can be done by identifying the most important details used to support the central idea of each paragraph and finding the common element among the central ideas throughout the text.
Therefore, the correct options are B, C, E and F.