From 250 to 800 AD, the Mayan civilization was still very developed, the city was prosperous, and the harvest of crops was also very pleasing. The climate records show that the Maya region had relatively high rainfall during this period. Since then, the Mayan civilization began to decline. From about 820 AD For 95 consecutive years, the region has begun to experience intermittent droughts, and droughts in some places have lasted for decades. Many experts believe that climate change in the 9th century may be the reason for the demise of the Mayan civilization. Which of the following, if true, would best support the views of these experts? ['The Mayan cities that declined in the 9th century were mostly distributed in the south, and construction activities using wood were also greatly reduced.', 'As with all large farming civilizations, the Maya society is largely dependent on crops, and drought has led to a reduction in agricultural products, seriously affecting the survival of the Maya.', 'Most Maya cities declined between 850 and 925 AD, coinciding with the time of the drought.', 'Stone carving and other construction activities in the Maya region were reduced by almost half between 1000 and 1075 when the local area suffered another severe drought.']