Based on the theoretical discussion of Interlanguage (IL) presented, evaluate the statements below:

I. Interlanguage is viewed as an independent linguistic system that develops gradually between the learner’s L1 and the target language (TL), reflecting a continuum rather than a direct transfer from either language.
II. Fossilization refers to temporary, context-dependent errors that tend to disappear as learners receive more input, and therefore does not represent a permanent stage in IL development.
III. According to Selinker, IL forms arise from latent psychological structures (LPS) and may include influences such as language transfer, overgeneralization, strategies of learning, and strategies of communication.
IV. Variability in IL can manifest systematically or non-systematically, depending on linguistic, situational, or performance-related factors, meaning IL production is not always uniform.

Mark the alternative that indicates the correct combination of statements.