Read the excerpt from “tools of the spymaster." general clinton, concerned about what general howe was planning and doing, made use of a mask to write a secret message in a letter to general burgoyne. before writing the letter, clinton had placed an hourglass-shaped mask on a piece of paper and then had formed the secret message within that shape. the unmasked letter had enough false information in it to fool any american who happened to see it. but when burgoyne viewed the letter with the mask, he read clinton's view of the real situation: howe has made a bad move; i don't have enough men to do anything about it. which word from this excerpt is most useful in determining the central idea?

Read sentence 13 from the draft. some plants retain a great deal of their foliage through much of the spring and summer, but the leaves do not retain their green color for long. which detail would be best to add after sentence 13 to develop the topic? a. since the green color of the leaves that are bright and abundant during the warmer months will disappear by the time it is fall, it is important that the leaves are trimmed and kept freshly cut so that they will last for as long as possible. b. while the temperature outside may dictate when the fall colors of leaves appear, it is only one of many environmental factors that play a part in the changing of colors from green leaves to fall-colored leaves during the cooler months. c. if people want to enjoy the green color of leaves longer, trees should be planted where the environment is warmer and the days longer because chlorophyll in the leaves can only be manufactured and replaced with sunlight and warmth. d. the green chlorophyll normally masks the fall-colored pigments during the warmer months, but as sunlight becomes less abundant and trees become frozen, the fall colors of leaves become more visible as chlorophyll disappears.