Which sentence best communicates the main idea of the paragraph? los angeles leaders made up their mind about the construction of a city airport after charles lindbergh's flight in 1927. charles lindbergh's solo flight across the atlantic in 1927 spurred the growth of air travel through its effect on decision makers. charles lindbergh flew solo across the atlantic in 1927 to convince business leaders and city officials to develop air transport facilities. magazine articles and city boosters worked hard to point out the value of air travel until charles lindbergh's 1927 flight across the atlantic.

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.