Final answer:
Year 10 students in the UK are the ones who have begun their GCSE courses. Predicting changes to the GCSEs is challenging, but students with 'C' grades might focus on improving, while students with 'A' grades would likely work on maintaining their high performance.
Step-by-step explanation:
In the UK, Year 10 students are typically those who have started their General Certificate of Secondary Education (GCSE) courses, which makes option A. Students in Year 10 the correct answer to the first question. As for changes to the GCSEs next year, it's difficult to predict with certainty since education policies can change due to numerous factors such as government decisions, educational research outcomes, or societal needs.
Students with "C" grades before any changes to the GCSEs might feel anxious about how the changes could affect their future academic and career opportunities, and thus they may act by seeking additional resources or studying harder to improve their grades. On the other hand, students with "A" grades might feel more secure but could still act proactively to maintain their high performance, possibly by keeping abreast of any curriculum updates and adapting their study strategies accordingly.