Hard A solar installation's output falls despite similar sunlight. Which investigation is most technically reasonable first? AReplace every component immediately BChange the national grid frequency CCheck shading, soiling, temperature, faults, and system measurements DAssume the sun produced no energy EIgnore the monitoring data Report a problem with this question What is wrong? The marked correct answer is wrongAn option is wrong or repeatedSpelling or wording mistakeSomething else Details (optional) Send report