One of the key sources of risks in component-based development is the reliance on one or more third-party software vendors. However, this dependence can also present new challenges for the evolution of such systems. Which of the following evolution challenges can be directly attributed to reliance on the vendor? a) Lack of control over when errors in components are fixed. b) Number and complexity of inter-component interfaces c) Diversity of inter-component interfaces d) Lack of experience and tools for evolving component-based systems