Şemada bir teknoloji yayılım süreci verilmiştir. Şemaya göre bu süreci İngilizce olarak en uygun anlatan cümle hangisidir?

• A Once a system has tested on a small group and corrected, wider use becomes safer.
• B Once a system has been tested on a small group and corrected, wider use become safer.
• C Once a system has been tested on a small group and corrected, wider use becomes safer.
• D Once a system was tested on a small group and corrected, wider use becomes safer now.
• E Once a system has been testing on a small group and correcting, wider use becomes safer.