Step 1: Understanding communication barriers. 
  
Effective communication can be hindered by various barriers, such as language differences, physical distance, and individual differences (e.g., personal biases, cultural differences). These factors can distort or hinder clear communication. 
Step 2: Analyzing the options. 
  
(A) Language: Correct. Language barriers, such as differences in language or vocabulary, can hinder understanding in communication. 
  
(B) Distance: Correct. Physical distance or emotional distance can also be a barrier to effective communication. 
  
(C) Individual differences: Correct. Differences in background, culture, or personal experiences can also hinder effective communication. 
  
(D) All of these: Correct. All of the above factors contribute to communication barriers. 
Step 3: Conclusion. 
  
The correct answer is (D) All of these, as all these factors are common barriers to effective communication.